#[macro_use]
extern crate hex_literal;
#[macro_use]
extern crate lazy_static;
extern crate ed25519_dalek;
extern crate hex;
extern crate rand;
extern crate secp256k1;
extern crate sha2;
use sha2::{Sha256, Digest};
use self::secp256k1::Message;
use rand::{rngs::OsRng, Rng};
pub mod constants;
pub fn sha256(value: Vec<u8>) -> Vec<u8> {
let mut hasher = Sha256::new();
hasher.input(value);
hasher.result().to_vec()
}
pub fn random_bytes(length: usize) -> Vec<u8> {
rand::thread_rng()
.sample_iter(&rand::distributions::Standard)
.take(length)
.collect()
}
pub fn generate_hash_onion(layers: usize, center: Vec<u8>) -> Vec<Vec<u8>> {
let mut onion = vec![center];
for _ in 1..(layers) {
onion.push(sha256(onion.last().unwrap().to_vec()));
}
onion
}
pub fn generate_keypair() -> (Vec<u8>, Vec<u8>) {
let signer = secp256k1::Secp256k1::new();
let mut rng = OsRng::new().unwrap();
let (private_key, public_key) = signer.generate_keypair(&mut rng);
(private_key[..].to_vec(), public_key.serialize().to_vec())
}
pub fn secp256k1_sign_recoverable(message_vec: Vec<u8>, private_key_vec: Vec<u8>) -> Vec<u8> {
let signer = secp256k1::Secp256k1::new();
let message = Message::from_slice(&message_vec).unwrap();
let private_key = secp256k1::SecretKey::from_slice(&private_key_vec).unwrap();
let signature = signer.sign(&message, &private_key).serialize_compact();
signature.to_vec()
}